CAPÍTULO III DISEÑO METODOLÓGICO
Anexo 6. Especificaciones técnicas de materiales y equipos
The limitations of the proposed techniques and recommendations concerning future work that could potentially improve the optimizing wind farm power output control based on estimating health condition of wind turbines.
1. In chapter 4, the data used in this paper are mostly representative of the normal operation of wind turbines and do not contain a great deal of information regarding the occurrence of faults; consequently, this paper employs static ELM models only. Future work will therefore consider dynamic models by taking into account the effect of more past inputs on the model output, and the different effect each component has on the health condition of the gearbox.
2. In chapter 4, the main purpose of using OS-ELM is to achieve training data being updated to ensure that the model is adapted to accommodate different operational behaviours of the wind turbines encountered during their operations. Real time online training capacity of the method is not considered in the thesis. However, this OS-ELM algorithm has the ability of achieving the online training in real time, if the sampling speed for updated training data is quick enough.
3. In chapter 5, the optimized power dispatch strategy considering the health condition of the wind turbine adopts the simple proportion distribution to dispatch reference power to each wind turbine. However, effects of different power generation strategies on wind turbine structural loads are different. Compared with baseline mode, de-rated and percentage mode can decrease the fatigue loads on sub-healthy wind turbines by limiting maximum power output. Percentage mode has better performance on reducing the torque loads on drivetrain system than de-rated mode at same active power output level. However, percentage mode also has higher the fatigue loads on blade system than de-rated mode due to increasing rotate speed of the rotor. High rotate speed of the rotor will increase the loads on blade system. It means that de- rated mode is more suitable to reduce loads on blade system, while percentage mode is more beneficial to decrease the torque loads on drivetrain system. So it is desirable to adopt an optimized control mode selection method in wind turbine control system for wind farm control, taking into account effects of power reserve control on wind turbine structural loading, to further optimize load reduction on sub-healthy component.
4. In chapter 6, the research is only focus on simulation analysis. Future work will focus on experimental testing of the proposed NPC three-level SAPFs to further verify their performance. Optimal selection of PI control parameters for the inverters will also be investigated in order to further optimize system performance under different load conditions. In addition, the application of the proposed current compensated NPC inverter is being considered in both a wind power generation system and a small grid system in the laboratory in order to address the power quality issues related to inverter-coupled generation and associated loads.
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